/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/core/SkCanvas.h"
#include "modules/svg/include/SkSVGEllipse.h"
#include "modules/svg/include/SkSVGRenderContext.h"
#include "modules/svg/include/SkSVGValue.h"

SkSVGEllipse::SkSVGEllipse() : INHERITED(SkSVGTag::kEllipse) {}

bool SkSVGEllipse::parseAndSetAttribute(const char *n, const char *v)
{
    return INHERITED::parseAndSetAttribute(n, v) || this->setCx(SkSVGAttributeParser::parse<SkSVGLength>("cx", n, v)) ||
        this->setCy(SkSVGAttributeParser::parse<SkSVGLength>("cy", n, v)) ||
        this->setRx(SkSVGAttributeParser::parse<SkSVGLength>("rx", n, v)) ||
        this->setRy(SkSVGAttributeParser::parse<SkSVGLength>("ry", n, v));
}

SkRect SkSVGEllipse::resolve(const SkSVGLengthContext &lctx) const
{
    const auto cx = lctx.resolve(fCx, SkSVGLengthContext::LengthType::kHorizontal);
    const auto cy = lctx.resolve(fCy, SkSVGLengthContext::LengthType::kVertical);
    const auto rx = lctx.resolve(fRx, SkSVGLengthContext::LengthType::kHorizontal);
    const auto ry = lctx.resolve(fRy, SkSVGLengthContext::LengthType::kVertical);

    return (rx > 0 && ry > 0) ? SkRect::MakeXYWH(cx - rx, cy - ry, rx * 2, ry * 2) : SkRect::MakeEmpty();
}

void SkSVGEllipse::onDraw(SkCanvas *canvas, const SkSVGLengthContext &lctx, const SkPaint &paint, SkPathFillType) const
{
    canvas->drawOval(this->resolve(lctx), paint);
}

SkPath SkSVGEllipse::onAsPath(const SkSVGRenderContext &ctx) const
{
    SkPath path = SkPath::Oval(this->resolve(ctx.lengthContext()));
    this->mapToParent(&path);

    return path;
}
